Chapter 2 Network configuration
115
Using the Business Policy Switch 2000 Version 2.0
Figure 21
Policy-based VLAN assignment
As shown in
, the untagged packet is marked (tagged) as it leaves the
switch through port 5, which is configured as a tagged member of VLAN 3. The
untagged packet remains unchanged as it leaves the switch through port 7, which
is configured as an untagged member of VLAN 3.
Figure 22
802.1Q tagging (after policy-based VLAN assignment)
Port 6
DA
SA
Data
CRC
BS45011B
Port 7
Port 8
Port 1
Po
rt
4
Po
rt
5
Port 2
Port 3
802.1Q Switch
PVID = 2
Untagged packet
Untagged member
of VLAN 3
Tagged member
of VLAN 3
Before
Policy VLAN = 3
BS45012B
Port 6
Port 7
Port 8
Port 1
Po
rt
4
Po
rt
5
Port 2
Port 3
802.1Q Switch
Key
Priority
CFI
VID
- User_priority
- Canonical format indicator
- VLAN identifier
PVID = 2
Tagged member
of VLAN 3
Untagged member
of VLAN 3
After
DA
SA
Data
CRC
(*Recalculated)
Outgoing
untagged packet
(unchanged)
DA
SA
Data
CRC*
Tag
VID = 3
Priority
16 bits
3 bits
1 bits
12 bits
8100
CFI
Policy VLAN = 3
Summary of Contents for business policy switch 2000
Page 16: ...16 Contents 208700 C ...
Page 22: ...22 Figures 208700 C ...
Page 26: ...26 Tables 208700 C ...
Page 32: ...32 Preface 208700 C ...
Page 308: ...308 Chapter 4 Policy enabled networks 208700 C ...
Page 348: ...348 Chapter 5 Sample QoS configuration 208700 C ...
Page 392: ...392 Appendix D Connectors and pin assignments 208700 C ...